* 3.7.3
- glibc-restore.sh: don't touch glibc package
- is_active_systemd: base on static info about systemd running
- epm-release_upgrade: run __check_system (assure we still have systemd) after upgrade
- add tip about epm repo --help and improve epm repo --help
- epm-repofix: add hack to fix apt-repo urls, some improvements